GGG stands for Good, Giving, and Game. More specifically: good in bed, giving equal time and equal pleasure, and game for anything—within reason. The term was coined by Dan Savage, gay author and sex advice columnist for the Stranger.

The opposite would be someone who is shitty, selfish, and totally square in the sack.

I thought my partner would be reserved about my kinks, but he turned out to be GGG.

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An internet meme appearing on 4chan, Reddit, and other sites about the classiest guy around. The meme involves a photo of a smiling, confident, stubbled guy smoking a joint and giving a friendly reassuring look toward the camera. On top of this photo, people will write of Good Guy Greg's classy deeds. He borrows your car and returns it with a full tank of gas. He parties with you on your birthday but never tells anyone about how you puked on yourself. He comes over for dinner and washes the dishes. He is better than you in every way, but never talks about it and makes you feel better about yourself instead.

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Giant Global Graph (GGG) was notably used the first time by the inventor of the World Wide Web, Tim Berners-Lee, on his blog.

Tim Berners-Lee thinks about the social network itself that is inside and between social-network Web sites such as Facebook. He assumes that people can use the word "Graph" to distinguish these from the "Web". Then he says that, although he called this graph the Semantic Web, maybe it should have been called the "Giant Global Graph".
"GGG" has been used several times by Berners-Lee and by others in other blogs. GGG may be described as the content plus pointers of the WWW transitioning to content plus pointers plus relationships plus descriptions.

Nerd: Dude who needs the world wide web when you can have the Giant Global Graph!

Brother: Get a life. GGG stands for good, giving, and game. Like my girlfriend...